Abstract
Upon re-examination Proexenocrinus inyoensis Strimple & McGinnis, the oldest camerate crinoid known, is interpreted as a diplobathrid camerate assigned to the family Rhodocrinitidae rather than a monobathrid assigned to the Tanaocrinidae, as suggested by previous workers. The slab containing the holotype of P. inyoensis also has two undescribed crinoid specimens. These new Early Ordovician crinoids are described and assigned to Inyocrinus strimplei gen. et sp. nov. These specimens are from the Al Rose Formation of west-central California, U.S.A. (upper Ibexian; Arenigian).
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